hermes_cli still reached into cron's private _jobs_lock and hand-built the
"created paused" record one function away from the module created so callers
never duplicate cron's schema. import_job_definitions() now holds the lock,
loads, merges and saves, and labels a merge ValueError with the job name;
_merge_cron_store keeps only the temp-store parse and the DistributionError
wrap, and takes the profile home instead of deriving it from dest.parent.parent.
Also drops the dead `and key != "repeat"` (repeat is reassigned right after)
and the comment that restated the module docstring.